Pokhariyal G P, Moturi C A, Hassanali J, Kinyanjui S M
Department of Mathematics, School of Computing and Informatics, University of Nairobi, PO Box 30197, Nairobi, Kenya.
East Afr Med J. 2004 Nov;81(11):599-602.
To develop a simulation model for dental arch shapes.
Analysis of measurements of dental casts to determine a general second degree equation for the dental arches.
Department of Human Anatomy and School of Computing and Informatics, University of Nairobi.
The measurement of dental casts, 30 (15M and 15F) each from three Kenyan ethnic groups (Maasai, Kalenjin, Kikuyu), aged 12 years.
The arches change their shapes from a parabola to an ellipse, governed by the boundary conditions at the position of the canine tooth, based on the general second degree equation for the conic sections.
The simulation model graphically confirms the change from parabolic to elliptic shapes of dental arches with boundary conditions at the canine. This could be used to show the changes in dental arches for other ethnic groups.
建立牙弓形状的模拟模型。
分析牙模测量数据，以确定牙弓的一般二次方程。
内罗毕大学人体解剖学系及计算与信息学院。
来自三个肯尼亚族群（马赛族、卡伦金族、基库尤族）、年龄为12岁的牙模测量数据，每组30例（男15例，女15例）。
基于圆锥曲线的一般二次方程，牙弓形状从抛物线变为椭圆，受尖牙位置的边界条件控制。
该模拟模型以图形方式证实了牙弓在尖牙处边界条件下从抛物线形状变为椭圆形状的变化。这可用于展示其他族群牙弓的变化情况。
